autocrop {imager} | R Documentation |
Autocrop image region
Description
Autocrop image region
Usage
autocrop(im, color = color.at(im, 1, 1), axes = "zyx")
Arguments
im |
an image |
color |
Colour used for the crop. If missing, the colour is taken from the top-left pixel. Can also be a colour name (e.g. "red", or "black") |
axes |
Axes used for the crop. |
Examples
#Add pointless padding
padded <- pad(boats,30,"xy")
plot(padded)
#Remove padding
autocrop(padded) %>% plot
#You can specify the colour if needs be
autocrop(padded,"black") %>% plot
#autocrop has a zero-tolerance policy: if a pixel value is slightly different from the one you gave
#the pixel won't get cropped. A fix is to do a bucket fill first
padded <- isoblur(padded,10)
autocrop(padded) %>% plot
padded2 <- bucketfill(padded,1,1,col=c(0,0,0),sigma=.1)
autocrop(padded2) %>% plot
[Package imager version 1.0.2 Index]